export default {
  namespaced: true,
  state: () => ({
    cart: JSON.parse(uni.getStorageSync('cart') || '[]')
  }),
  mutations: {
    addToCart(state,goods) {
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
      if(findResult) {
        findResult.goods_count++
      } else {
        state.cart.push(goods)
      }
      this.commit('m_cart/savaToStorage')
    },
    savaToStorage(state) {
      uni.setStorageSync('cart',JSON.stringify(state.cart))
    },
    updateGoodsState(state,goods) {
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
      if(findResult) {
        findResult.goods_state = goods.goods_state
        this.commit('m_cart/savaToStorage')
      }
    },
    updateGoodsCount(state,goods) {
      const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
      if(findResult) {
        findResult.goods_count = goods.goods_count
        this.commit('m_cart/savaToStorage')
      }
    },
    removeGoodsById(state,goods) {
      state.cart = state.cart.filter(x => x.goods_id !== goods.goods_id)
      this.commit('m_cart/savaToStorage')
    },
    updateAllGoodsState(state,newState) {
      state.cart.forEach(x => x.goods_state = newState)
      this.commit('m_cart/savaToStorage')
    }
  },
  getters: {
    total(state) {
      let c = 0
      state.cart.forEach(goods => c += goods.goods_count)
      return c
    },
    checkedCount(state) {
      return state.cart.filter(x => x.goods_state).reduce((total,item) => total+item.goods_count,0)
    },
    checkedGoodsAmount(state) {
      return state.cart.filter(x => x.goods_state).reduce((total,item) => total+item.goods_count*item.goods_price,0).toFixed(2)
    }
  }
}